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I. WHICH OF THE FOLLOWING FORMULAS ARE NOT WFFS ? _____1. ~q ~p _____2. É(q ·...

I. WHICH OF THE FOLLOWING FORMULAS ARE NOT WFFS ? _____1. ~q ~p _____2. É(q · r) _____3. p v q · ~r É q _____4. (p v r) · (p v q) É (r · ~q) _____5. (r v s) v ~[(p É r) · (s v q)] _____6. (p · q) v (~r É p) _____7. ~(p É r · p É q) _____8. s _____9. ~~~r _____10. ~(p v r) · q

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